Friction clutch



p 9, 1952 L. D. STRIPLING 2,609,902

FRICTION CLUTCH Filed Dec. 15, 1948 2 SHEETS--SHEET 1 if 2 Fig.4.

Leslie 0. SfnIo/ing INVENTOR.

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Sept. 9, 1952 D. STRIPLING FRICTION CLUTCH 2 SHEETS-SHEET 2 Filed Dec.15, 1948 puny. 3M

Patented Sept. 9, 195 2 QJJiUNITEDI, STATES .PATENT OFFICE, i 5,509,962;l

FRICTION c U'ron I lesl ie D. Stripling, Bay City, Tex. ApplicationDetaine 15, 1943, seri rlv rsaser The present invention'relates to newanduseful improvements in friction clutches and'more particularly tomeansfor eliminating slipping of the clutch due'to variationsin the loadsubjectedthereto. f I

An important object of the invention is to provide a clutch andincluding dual clutching elements, one of 'said clutch" elements beingman ually controlled and the other of such clutch elements beingcontrolled'automatically by the manually operated clutch element.

A still further object is to provide a friction clutch mechanism 3 ofsimpleand practical construction, which is efficient and reliable inoperation. relatively inexpensive to manufacture and otherwisewelladapted for the purposes for which the same is intended. i

Other objects and advantagesreside in the details of construction andoperation as more fully hereinafter described and claimed; referencebeing 'had to the accompanying drawings forming part hereof. whereinlike numerals refer to like parts throughout, and in whichi c i Figure 1is an internalview of the master clutchdrum with parts shown in section;

Figure 2 is a sectional view. taken substantially on a line 2--2 ofFigurel;

Figure 3 is a sectionalview taken on a line 3-3 of Figure 2, and; i i 5I Figure 4 is a fragmentary sectional view taken on a line 4-4 of Figure1.

Referring now to the drawings in detail wherein for the purpose ofillustration I have dis.- closed a preferred embodiment of the inventionthe numeral 5 designatesa shaft on which. a master clutch drum 6 isjournalled, theshaft 5 andfdrum 6 constitutingthe drive or driven el'ements as the case may be;

A sleeve 1 is secured to the inside of the drum 6 by screws or the like6 and is freely mounted on the shaft the sleeve being formed with splinegrooves 9 by means of which the hub ID of a clutchplate II is secured,the clutch plate having friction clutch rings I2 and I3 suitably securedto its opposite surfaces. The hub I is slidable on the sleeve 1 betweenkeeper rings l4 and I secured to the sleeve.

A clutch disk is shown at l6 which includes a hub portion I1 freelymounted on sleeve 1 and to which a gear I8 is suitably secured. Theouter edge of clutch disk [6 is formed with an annular flange 19projecting from a side thereof opposite to hub I1 and to the innerperiphery of which an annular clutch adjusting plate 20 is threadedlysecured.

zl'witli the friction clutch plate l3.

vs cl ims; (01.192-45) An annular clutch pressure plate or ring 521 ispositioned inwardly of ring 20 and is provided at one surface withjaplurality of stems- 22 slidably mounted in'openings 23in thefplate 20.The opposite surfaceof pressure plate 2| isfpositioned for engaging thefriction clutch ring l3 andthe plate 2| is held released therefrom bycoil springs 24 mountedon the stems 22 and bearing against washersZSsecured to the stems.

A clutch actuating collar '26is slidably mounted on sleeve I and towhich pivoted cams 2'1 are connected by links 23, the earns 21 engagingthe outer ends of stems 22 for sliding the same inwardly in a directionto engage pressure plate A clutch yoke 29 is carried by collar 26 and isactuated by control rods 30 sliding in a bell mounting plate3 I keyed toshaft 5. V

A plurality of pins 32 are carried by the mounting plate 3| adjacent theouter edge thereof and on which are pivotallymounted one end i of clutchshoes 33 having friction clutchlinings A pair of gear segments 36 arepositioned in engagement withgear I 8 at the diametrically oppositesides thereof, the gear segments including an arm 31 pivoted on the pins32 and formed at its pivoted end with a lateral bar 31a of substantiallysquare shape in cross section and provided on one face with a pair ofparallel cam ribs 38 and 38a positioned at opposite sides of the bar andengaging the free end" of an adja cent clutch shoe 33-.

The clutch adjusting plate 26 is locked in its adjusted position by alug 39 projecting radially from the plate '20 andselectively engaged innotches) in theedgeof flange 19.

In'theoperation of the'device, either the shaft 5 or drum 6 mayconstitute the drive and driven elements, the drum 6 being secured tosleeve 1 free of the shaft and clutch plate ll being carried by sleeve Ito rotate with the drum. Clutch plate [6, and gear l8 rotate on sleeve 1and are connected to the shaft by plate 3|, pins 32, arms 31 and gearsegments 36 which engage the gear l8. Pins 32 also carry the clutchshoes 33.

Figure 2 shows the actuating clutch bands 12 and I3 in engaged position.

To release the clutch, collar 26 is moved outwardly as shown by dottedlines in Figure 2, by rods 36, causing levers or cams 21 to release 3pressure studs 22 and pressure plate 2| is moved outwardly by springs 23to release plate 2| with clutch bands l3 and to release clutch bands I2between gear [8 and gear segments 36 to tighten the clutch shoes 33. I 1

As indicated by dotted lines in Figure 3 movewill serve Should slipping1 occur at the master clutch the relative movement ment of gear segment36 in one/direction will apply the clutch shoe through the action of cam33 while an opposite movement of the gear segment will cause cam 38a tosimilarly apply the clutch shoe to provide for relativemovement of thedrive and driven elements in either direction.

In view of the foregoing de scription taken in conjunction with theaccompanying drawings it is believed-that a clear understanding of thedevice will be quite apparent to those skilled in this art. A moredetailed description is accordingly deemed unnecessary.

It is to be understood, .however, that even though there is herein shownand described a preferred embodiment of the invention, the same issusceptible to certain changes fully comprehended by the spirit of theinvention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is: v a

1 In combination with a drum freely rotatable on a shaft, a clutchcomprising, a sleeve fixed to said drum and rotatable on said shaft, a:clutch disk on said sleeve having an annular flange, a

hub :on said disk having a gear thereon, said disk.

and sleeve being relatively rotatable, an'annular clutch plate insaid'flange splined on said sleeve for rotation therewith and slidingthereon into frictionalengagement with said clutch disk, anannularmember fixed inr said flange, a presser ring in said flangemovable therein for sliding said clutch plate into engagement with saiddisk and being confined in said flange by said memoer, means operablefor moving said ring, mounting means fixed to said shaft to rotatetherewith, shoe means within saiddrum, and arm rneans pivotally mountedon said mounting means; and including a gear segment to mesh with saidgear, said arm means being adapted upon relative rotation of said gearand saidsegment to bear against and expand said shoe means to grip saiddrumJ 1 2. In combination with a drum freely rotatable on a shaft, aclutch comprising, a sleeve fixed to said drum and rotatable on saidshaft a clutch 4 disk on said sleeve having an annular flange, a hub onsaid disk having a gear thereon, said disk and sleeve being relativelyrotatable, an annular clutch plate in said flange splined on said sleevefor rotation therewith and sliding thereon into frictional engagementwith said clutch disk, an annular member fixed in said flange, a presserring in said flange movable therein for sliding said clutch plate intoengagement with said disk and being confined in said flange bysaidmember, means operable for moving said 'ri'ngjn iounting means fixedto said shaft to rotate therewith,

"shoe means within said drum, and arm means pivotally mounted on saidmounting means and including a gear segment to mesh with said gear,

said arm means being adapted upon relative rotation of said gear andsaid segment to bear against and expand said shoe means to grip saiddrum, said ring moving means including sliding pins in said ringcarrying the ring.

3. In combination with a drum freelyrotatable on a shaft, a clutchcomprising, a sleeve fixed to said drum and rotatable on said shaft, aclutch disk on said sleeve having an annular flange, a hub on said diskhaving a gear thereon, said disk and sleeve being relatively rotatable,an annular clutch plate in said flange splined on said sleeve forrotation therewith and sliding thereon into frictional engagement withsaid clutchdisk, an annular member fixed in said flange, a presser, ringin said flange movable therein for sliding said clutch plate intoengagement with said disk and being confined in said flange by saidmember, means operable for moving said ring, mounting means fixed tosaid shaft to rotate therewith,

shoe means within said drum, and arm means pivotally mounted on said,mounting means and including a gear segment-to mesh with said gear, saidarm means being adapted, upon relative rotation ofsaid gear-andsaidsegment to bear against and expand said shoe means to grip saiddrum, said ring moving means, including sliding pins in said ringcarrying the ring, and pivoted cams on the ring for sliding said pins.

LESLIE D, sTRrPLI GL;

REFERENC S CrrEn Thefollowing references are file of this patent:

UNITED STATES PATENTS Number I Name V Date,

615,268 'Gillet Dec. s, 1898" 1,421,558 Preimesberger July 4, 19222,038,038 j Gregg Apr'.,2 1,'l936 2,063,203 Stanley Dec. 8, 19362,079,753 Tower .Q. May 11, 1937 2,311,679 Miller Feb. 2 3, le s FOREIGNPATENTS Number Country Date.

342,446 'Great Britain Feb.' 5, 1931 of record in the

